Convert a number to date

[Anirudh1]

Hello, I am trying to do a report with Month over month% change. Our date field is a numeric field i.e for example has value 20160501. I need to get priormonth same day and compare counts . I am trying to do this in sas enterprise guide. What is the function I should use to get priormonth day value out of this field? Any help is much appreciated

[paulkaefer]

Use the INTNX function.

For example:

intnx('month', yourVariable, -1, 'same');

will return the same day in the previous month (-1)

Use 'b' or 'e' to return the beginning or end day of the previous month, respectively.

More information and examples.

[Kurt_Bremser]

data want;
set have;
date = input(put(numdate,8.),yymmdd8.);
run;

[Reeza]

I'm assuming you're asking how to find the record that is a year before, not just the date. 

You need to provide your data structure, what you want as output and ideally, if you're using the GUI in EG or coding. 

Please post data as text, NOT as an image. 

[ballardw]

First thing when looking at manipulating dates is to start with a SAS date valued variable. @Kurt_Bremser shows how to convert your number to a SAS date value.

Then you can use a number of SAS functions to either increment a date, INTNX or examine the different number of time periods between two dates (or time or datetimes) with INTCK.

You would likely want to look a a new date of a given interval.

Priormonth = INTNX('month',date,-1,'same');

That says to create a new date value that is one month before the value of date for the same day of the month.

How to compare counts would require much more knowledge about the structure of your current data set and how you are counting. You might be better off posting some example input data and the desired result.

[Anirudh1]

Thank you all for your responses !!

I am using GUI in the SAS EG. If I can get the prior month date value then I know how to get the record and do the comparsion...Here is what I have. I have a booking date which is a number and I think the input function posted by KurtBremser I converted to date and the next step was to get prior month same day but I am getting a blank...I am not sure what I am doing wrong.

Thank you for helping me out !!

BOOKING_DT	put(t1.BOOKING_DT,8.)	input((put(t1.BOOKING_DT,8.)),yymmd8.)	intnx('month',(input((put(t1.BOOKING_DT,8.)),yymmd8.)),-1,'same')
20140717	20140717	20140717
20140808	20140808	20140808
20140904	20140904	20140904
20140910	20140910	20140910
20140918	20140918	20140918
20141013	20141013	20141013
20141107	20141107	20141107

[TomKari]

You're missing a letter in the format name. It's yymmdd8. not yymmd8.

Tom

[Anirudh1]

Thank you !!